NSU Chapter 5
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| sensation | A change in the responsiveness of the sensory system based on the average level of surrounding stumulation.
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| perception | The brain's process of organizing and interpreting sensory information to give it meaning.
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| bottom-up processing | Processing that begins with sensory receptors registering environmental information and sending it to the brain for analysis and interpretation
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| top-down processing | Processing of perceptual information that starts out with cognitive processing at the higher levels of the brain
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| absolute threshold | The minimum amount of stimulus energy that a person can detect.
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| difference threshold | The smallest difference in stimulation required to discriminate one stimulus from another 50 percent of the time; also called just noticeable difference.
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| sensory adaptation | A change in the responsiveness of the sensory system based on the average level of surrounding stimulation.
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